Transfer and feeler control mechanism for shuttle-changing looms



March 11, 1930. A, J, CQEVRETTE 1,749,934

TRANSFER AND FEELER CONTROL MECHAfiISM FOR SHUTTLE CHANGING LOOMS Filed March 2, 1928 3 Sheets-Sheet l m n AUG-LIST! N UTCHEVFPETTE A-vToFNEys Marchll, 1930. I CHEVRETTE 1,749,934

TRANSFER AND FEELER CONTROL MECHANISM FOR SHUTTLE CHANGING LOOMS 7 Filed March 2, 1928 3 Sheets-Sheet 2 .99 A f. .6 i7 I J;

INVENTOR AUGUSTIN I CHEVFEITE N w *M A' -oRwEys March-l1, 1930. A. J. CHEVRETTE 1,749,934

TRANSFER AND FEELER CONTROL MECHANISM FOR SHUTTLE CHANGING LOOKS Filed March 2, 1928 3 Sheets-Sheet 3 INVENTQH' AUG-LISTlN T CH EV R E. TTE.

A'TYOR NEYS Patented Mar. 11, 1930 UNITED STATES;

PATENT OFFICE AUGUSTIN J'. OHEVRETTE, OF WOROESTER, MASSACHUSETTS, ASSIGNOR TO CROMP- TON &: KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS TRANSFER AND FEELER CONTROL MECHANISM FOR SHUTTLE-CHANGING LOOMS Application filed March 2,

This invention relates to shuttle changing looms of the general type shown in my prior application, Serial No. 196,378, filed June 3, 1927.

In the operation of the loom therein shown, the shuttle change occurred one pick after indication of weft exhaustion, which was found to provide a very limited period in which to affect the shuttle change.

It is the general object of my invention to provide mechanism by which the shuttle change will be delayed after indication, 'so that the transfer will take place on the third pick after indication instead of on the first pick. A further object is to provide means for disabling the weft detector or feeler on the first return of the shuttle to the detecting side of the loom, after the indication of weft exhaustion.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

The preferred form of the invention is shown in the drawings in which Fig. 1 is a partial side elevation of a loom embodying my invention, certain parts being shown in section;

"Fig. 2 is a partial plan view, looking in the direction of the arrow 2 in Fig; 1;

Fig. 3 is a detail sectional elevation, taken along the line 33 in Fig. 1;

Fig. 4 is a detail plan view, looking in the direction of the arrow 4 in Fig. 1;

Fig. 5 is a partial front elevation, looking in the direction of the arrow 5 in Fig. 1;

Fig. 6 is a partial side elevation at the right hand or weft detecting end of the loom;

Fig. 7 is a plan View of the parts shown in Fig. 6;

Fig. 8 is a partial sectional rear elevation, taken along the line 8-8 in Fig. 6;

Fig. 9 is a side elevation of certain parts,

looking in the direction of the arrow 9 in Fig. 8; and c Fig. 10 is a diagrammatic representation of the successive positions of the shuttles during a shuttle change.

Referring particularly to Figs. 1 to 4, I have shown parts of a shuttle changing loom 1928. Seria1 No. 258,557.

of the general type shown in my prior application above referred to, said parts comprising a loom frame 20, supporting a shuttle holder or magazine 21 in fixed position above the path of movement of a lay 22. A drop box frame 23 is mounted for vertical movement in the lay 22 and comprises an upper or regular shuttle box above the lateral projection 24 and a lower or auxiliary shuttle box below the projection 24. A binder is mounted in fixed vertical position and cooperates with the shuttle opposite thereto, whether it is located in the upper or lower box. A shuttle receiver 26 is mounted adjacent the forward position of the lay and is adapted to receive the ejected shuttles.

When a shuttle change is indicated the drop boxes are elevated so that the regular box assumes a raised position in which it is adapted to receive a fresh shuttle from the magazine 21, while the lower or auxiliary box is positioned at the level of the lay to receive the exhausted running shuttle. As soon as the exhausted shuttle is thus received the boxes are lowered,releasing the exhausted shuttle to the receiver 26 and placing the fresh shuttle in running position where it may be engaged by a picker actuated by the usual picker stick 27. i

The drop boxes are mounted on a lifter rod 28 adapted to be moved vertically on the lay 22 and having a giveway connection 29 to a lifter lever 30, pivoted at 31 on the loom frame 20. An actuating lever 32 is also mounted to swing about the pivot 31 and is provided with a roll 33 engaging a cam 34 on the regular bottom or cam shaft 35 of the loom.

A latch 36 (Fig. 2) is pivoted at 37 on the lever 32 and is normally held outward by a spring 38. An arm 39 projects downward from the latch 36 and is connected by a spring 40 and chain or cord 41, bellcrank 42 (Fig. 1) and link or chain 43 to an arm 44 on a rock shaft 45. A spring 46 is provided to hold the lever 32 in engagement with its cam 34.

When the spring 40 is tensioned by the connections above described, the latch 36 is held yieldingly against the face of the lever 30 hand end of the ward under the lever, in position to engage the lever 30 upon the next upward movement of the actuating lever 32 and latch 36.

The parts thus far described are in general similar to those shown in my prior appli-, cation, except for the addition of the spring 40 and its connections.

Weft indicating mechanism is provided at the opposite side of the loom as indicated in Figs. 6 to 9. For this purposeI provide a detecting memberor rod '54; slid'ably mounted in a support 55. When the detecting member 5a is moved forward for engagement by a full bobbin, it engages a depending arm 56 (Fig. 8) on a member 560 mounted on a stud 561 fixed in a lever 562. The member 56(1) is provided with a depending latch 57, and the lever 562 is pivoted at 58 on a fixed bracket 59. The outer end of the lever 562 is connected by a link 60 to an arm 61 secured to the right rock shaft 45 previously described. f 7

An actuating rod 62 is slidablymounted in a fixed bearing 63 and has its lower end connected to a cam lever 64 pivoted at 65 "and having a cam roll 66 engaged by a path cam 67, also on the bottom shaft 35. The latch 57 is provided with a weight 68 (Figs. 6 and 7) which moves the latch to position for engagement by-the notched upper end of the actuating rod 62, as indicated in full lines in Fig. 9, whenever the actuating rod is lowered.

If the weft detector 54 is then pushed for ward by engagement with a full bobbin, the latch 57 is moved forward out of the. path of the rising actuator 62, as indicated in dotted lines in Fig. 9. When the supply of weft be comes substantially exhausted, however, the detector 54 remains in rearward position and the latch is engaged by the upwardly moving I actuator, causing the shaft 45 to be rocked and thus communicating movement to the control latch 86 for the drop box mechanism."

The cam 67 (Fig. 6) is so designed that the actuating rod 62 is normally elevatedbut is quickly lowered'and immediately raised once in each revolution of the shaft 35, correspond ing to two revolutions of thecrank eshaft and to two beats of the lay. Consequently, if the latch'57 is engaged by the actuator, the latch 57 will be held raised for a considerable period, during which time the connections through the rock shaft 45 and bell crank 42 will hold the spring 40 (Fig. 3) under tension, sothat the latch 36 will move to operative position under the lever 30 when the lever 32 is lowered.

The cam 34 is so designed and so positioned in relation to the cam 67 that the latch 86 cannot move to operative position immediately ing the drop boxes before the exhausted shuttle returns. By thus delaying the operation of the shuttle changing mechanism, it becomes unnecessary for the boxes to operate at the high speed previously required, the shuttle change operation is rendered more certain,,

and there is less liability of injury to the mechanism.

It is;desirable to render theweft detector l 54 inoperative during the intervening return flight of the exhausted shuttleto the detecting side of the loom before the shuttle change takes place. Forthis' purpose,Iprovide a lever-70 (Figs. 1 and 4c) pivoted at 71 on the loo-m'frame 20 and'having a pin 72 extending below the lifter lever 30. A spring74 holds the pin yieldingly againstthe'under side of the lever. A link 75"connects the lever. 70 to an offset or crank portion 76 (Figs. 1 and 5) at the end of a cross rod 7 7 mounted in bear ings 78 on the fr'ont'of theloom'. "At the de tecting side of the loom, the rod 77 is bent rearward and upward as indicated 'at' 80 (Figs. 6 to 9) and is provided at its upper end with a'stud '81 positioned to engage the latch 57 W hen the rock shaft/77' is moved angularly'by its connections from the lever 70, the

stud 81 is moved forward, swinging the latch" 57 out of the path of the actuator 62 and thus holding the detecting mechanism inoperative regardless of the position of thedetector 54.

Having thus described my invention and the details of construction thereof, the novel method of operation will be apparent by reference to the diagrams shown in Fig. 1O. The

numerals I, II, III, IV and V indicate succes; sive picks in the operation of the loomand the lines9O and 91 indicate the bottoms ofthe reg-v ular and auxiliary shuttle boxes, the line 92 7 indicating the shuttle race.

Let it be assumed that the shuttle S is indicated as substantially exhausted on the pick bearing the numeral I, the drop boxes-being in normal position. On the next pick, indicated by the numeral II, the shuttle S is, at the magazine side of the loom but in the upper or 7 regular box-and'the boxes are stillin their normal or lowered position. 7' 7 i At the beginning of the thirdbeat, indicated at III, the shuttle S has started its re turn flight to the detector side oftheloom andv sitioned in the upper box 90; It is at this point that the lifting of the boxes disables the detecting mechanism while the shuttle S isat the detectingside of the loom.

During the fourth beat the. shuttle S. re

turns toth-e drop box side of the loom and is received in the lower or. auxiliary box 91,

the new shuttle S being at the same time positioned in the raised regular box 90. The boxes are then lowered to the successive positions indicated at IV and IV until the new shuttle S is in normal running position and the exhausted shuttle S is in lowered position and ready to be discharged.

On the fifth beat, the new shuttle S trav- 'els to the detecting side of the loom, the parts hen being in the same position as on the first beat and the detector being released for further indication.

By the provision of delay in the shuttle change I make possible a more easy movement of the mechanism, and by connecting the drop boxes to the control lat-ch of the detecting mechanism I prevent elfective operation of the detector during the intervening return flight of the exhausted shuttle.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed otherwise than as set forth in the claims, but what I claim is 1. In a shuttle changing loom, weft detecting mechanism atone side of the loom, shuttle changing mechanism at the other side of the loom, and separate actuating cams for said two mechanisms, said cams being relatively positioned to delay the shuttle change until after the second flight of the'shuttle to the shuttle changing side of the loom.

2. In a shuttle changing loom, weft detecting mechanism at one side of the loom, shuttle changing mechanism at the other side of the loom, and separate actuating cams for said two mechanisms, one of said cams being designed to hold an indication of weft exhaustion until after the shuttle begins a return flight to the detecting side of the loom.

3. In a shuttle changing loom, weft detecting mechanism at one side of the loom, shuttle changing mechanism at the other side of the loom, and control connections between said detecting mechanism and said shuttle changing mechanism, said connections including a box lifting lever, a latch to raise said lever, means to move said latch to engaging position relative to said lever, and means controlled by said detecting mechanism for moving said latch under said lever, said means including a spring adapted to hold said latch under tension until said latch is free to move under said lever.

4:. In a shuttle changing loom, weft detecting mechanism at one side of the loom effective to detect approaching weft exhaustion, shuttle changing mechanism at the other side of the loom including drop boxes and box lifting devices, a connecting member controlled by said detecting mechanism and normally positioned to render said shuttle changing mechanism operative and a connection from said box lifting devices to said connecting member effective to render said 

